Changing this setting without a GUI will require text editing.
Open up the /etc/network/interfaces file. I’m going to use nano, but you can choose a different editor
sudo nano /etc/network/interfaces
This is what you should see
auto eth0
iface eth0 inet dhcp
You need to change that to something like this.
auto eth0
iface eth0 inet static
address 192.168.1.7
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
dns-nameservers 192.168.1.2 8.8.8.8
You can remove the DHCP client
sudo apt-get remove dhcp-client
